Ludwig scale: understanding the three grades of female hair thinning

What do the three Ludwig grades look like?

Ludwig published his classification in 1977, focusing on thinning over the central and upper scalp. The original descriptions, reproduced in Gupta and Mysore’s 2016 review, distinguish increasing loss of coverage within this region. The Roman numerals I, II and III correspond to stages 1, 2 and 3 in many patient explanations.

Grade I: a limited reduction in coverage

Hair provides less coverage over the crown, although much of the affected area remains covered. The parting may become more noticeable, with a subtle reduction in the surrounding volume. In the classic pattern, the strip of hair along the forehead is preserved.

Assessment of this early grade takes account of the whole head of hair and any change over time. A naturally visible parting, considered on its own, cannot establish a hair disorder. Earlier photographs can help inform the consultation, particularly when the change has developed gradually.

Grade II: more obvious thinning across the crown

Coverage is noticeably reduced within the same region, allowing more of the scalp to show. The thinning around the parting becomes clearer, while the front border usually remains. Distinguishing grade I from grade II involves a clinical judgement about the extent of this change.

There is no standard percentage of lost hair defining the boundary. A grade therefore gives neither a count of follicles lost nor a measurement in hairs per square centimetre. When those details are useful for monitoring, they require additional examination or measurements.

Grade III: extensive loss of central coverage

In the historical definition, the third grade refers to a bare central and upper region within the area described by the earlier grades. It represents the most severe end of this classification. Loss of all hair across the entire scalp is a different presentation requiring assessment.

Age does not define any of the three grades. A woman does not automatically reach Ludwig III at a particular birthday, and the scale cannot predict when further thinning might occur. Advanced presentations also require careful examination of the hair remaining at the sides and back.

Why does the grade not explain the cause?

Female pattern hair loss usually involves both thinning and miniaturisation, in which follicles produce progressively finer strands. Coverage can decrease without a dramatic amount of hair appearing during washing. Our explanation of androgenetic alopecia covers this process and how the usual patterns differ between women and men.

The underlying factors extend beyond blood hormone measurements. Many affected women have no demonstrable excess of androgens, as discussed by Herskovitz and Tosti (2013) and Fabbrocini and colleagues (2018). A Ludwig grade therefore cannot establish that someone has “too much testosterone” or that the menopause has caused their thinning.

Another condition may resemble this pattern or occur alongside miniaturisation. For example, telogen effluvium can cause increased shedding after a medical or physiological event. The dermatologist then considers which findings reflect established thinning and which relate to a more recent change.

These three broad categories have limitations when the distribution is unusual. They cannot calculate the speed of progression or predict an individual response to medication. Their interpretation depends on the history, examination and comparisons made over time.

How do Ludwig, Sinclair, Savin and Olsen differ?

Charts found online do not always depict the same classification. Ludwig has three grades, whereas Sinclair uses five visual levels based on the central parting, with the first showing a normal appearance. The remaining levels describe increasingly visible scalp.

Savin provides a more detailed visual progression of crown thinning, with eight representations of increasing severity and an additional category for frontal recession. Some charts labelled Ludwig contain subdivisions that do not belong to its original three-grade classification. Before comparing reports, check which system was used and which chart the numbers refer to.

Olsen’s description emphasises thinning that becomes more pronounced towards the front of the parting. Seen from above, this creates a triangular distribution often called a “Christmas tree” pattern. It captures a shape that Ludwig grading alone represents less precisely (Gupta and Mysore, 2016).

The Norwood-Hamilton scale mainly describes temple recession and crown loss in the usual male pattern. These tools assess different distributions, so there is no universal conversion between a Ludwig number and a Norwood number. The clinician selects a classification suited to the pattern observed.

What assessment helps establish your diagnosis?

A consultation begins with the history: when changes first appeared, whether they were gradual or sudden, and whether similar episodes occurred previously. Medicines, a recent illness, childbirth or weight changes may help guide the assessment. It is also useful to distinguish hairs breaking along their shafts from hairs being shed at the root.

The clinician examines several areas of the scalp. Trichoscopy, an examination using magnification, helps reveal differences in hair diameter and associated findings. It complements the overall assessment and can help distinguish miniaturisation from other causes of thinning (Fabbrocini and colleagues, 2018).

Blood tests are selected according to symptoms and medical history, for example when a deficiency or thyroid disorder is suspected. Irregular periods, significant acne or unusual facial or body hair may warrant targeted hormone investigations. A scalp biopsy is sometimes needed if the diagnosis remains uncertain or scarring hair loss is suspected.

Seek assessment without waiting for a higher grade if shedding starts abruptly, produces bare patches or comes with persistent redness, scaling, pain or burning. A receding front hairline together with eyebrow loss may prompt investigation for frontal fibrosing alopecia. These findings need specific evaluation because treatment depends on the condition identified.

In the UK, your GP is an appropriate first contact even if the visible thinning is slight. The NHS advises seeking an explanation for hair loss before approaching a commercial hair clinic. Tell your GP if it is affecting your wellbeing, as the distress it causes may be greater than the visible grade suggests.

How can photographs help monitor changes?

Follow-up photographs are more useful when they show the same regions under comparable conditions. Keep the head position, lighting and way the hair is parted as consistent as possible. Ramos and colleagues’ 2023 treatment review highlights standardised clinical and trichoscopic photographs when assessing treatment response.

A picture of wet hair or strands clumped together cannot be compared directly with one showing dry, styled hair. Strong lighting can also make the scalp more visible. Flag these differences before interpreting a change in coverage as a change of grade.

Agree the timing of comparisons with the professional supervising your care. Daily pictures may mainly capture changes in lighting or styling, while treatment effects are assessed over months. Suitable dated photographs from the past can support the consultation without requiring constant checking.

An unchanged grade at two appointments can coexist with a subtler change in coverage. The clinician also considers the close-up examination, tolerability and consistency of treatment. Comparing your photograph with a chart can start a discussion, but cannot establish a diagnosis by itself.

Which treatments can be discussed after assessment?

Management depends first on the diagnosis, then on your aims and any contraindications. An additional condition may require treatment separate from the approach to miniaturisation. Depending on the findings, the aim may be better density, less progression or greater comfort with the appearance of your hair.

Topical minoxidil, applied to the scalp, has the strongest supporting evidence among medicines for female pattern hair loss in Ramos and colleagues’ 2023 review. Benefits are assessed over several months and usually require continued use. Check the appropriate product and directions with a doctor or pharmacist.

Scalp irritation, unwanted facial hair and a temporary increase in shedding when starting treatment can occur. Report troublesome effects and discuss the plan rather than changing several products at once. Pregnancy, plans to conceive or breastfeeding should be discussed before beginning any hair-loss treatment.

A specialist may consider other medicines in selected circumstances. Neither their suitability nor their monitoring requirements follow automatically from grade I, II or III. Oral medication and a preparation applied to the skin have different precautions; someone else’s prescription is not an appropriate trial treatment.

PRP injections and some low-level light devices have also been studied. Protocols, equipment and the quality of evidence vary, limiting direct comparisons and predictions of response. Before paying for a course, ask what improvement is being sought and how it will be assessed.

Concealing fibres or a hairpiece may improve appearance during treatment or offer a longer-term option according to personal preference. Their purpose is to cover visible thinning cosmetically. A dermatologist can help discuss comfort, attachment methods and maintenance alongside other aspects of care.

Can grade II or III determine whether a transplant is suitable?

Surgical assessment includes examining the donor area, commonly across the rear and lateral scalp. In some women, thinning affects these regions too, restricting the amount of suitable hair available for harvesting. The Ludwig number mainly records the crown appearance and does not describe this reserve adequately on its own.

The surgeon also assesses the stability of hair loss, scalp health and the area needing coverage. Ramos and colleagues’ 2023 review stresses careful selection, including excluding active scarring disease or inadequate donor hair. Extensive thinning may therefore lead to another management approach despite a high grade.

Transplantation redistributes existing follicles, with ongoing monitoring still needed for the native hair. Risks include scarring and temporary shedding around the procedure, which should be discussed before a decision. Our guide to hair transplantation for women explains the assessment and questions to prepare when surgery is medically appropriate.

Decisions about harvesting and implantation follow that evaluation. A classification cannot independently prescribe FUE or DHI, a graft count or a final density. Those decisions require individual planning and expectations that match the available donor hair.

Preparing for advice and a possible procedure in Istanbul

Bring previous medical reports, a list of your treatments and a few dated photographs to the appointment. Ask which diagnosis explains the findings, what a reasonable aim would be and how progress will be assessed. If different scales have been used, clarify what each description means before comparing the numbers.

At Body Expert, our team can explain the arrangements for a hair transplant in Istanbul when medical assessment supports considering surgery. The Ludwig grade helps describe your hair; suitability depends on examination of the whole scalp and the donor reserve.

Sources

Ludwig, E. (1977). Classification of the types of androgenetic alopecia (common baldness) occurring in the female sex. British Journal of Dermatology, 97(3), 247-254. Bibliographic record and abstract.

Gupta, M., & Mysore, V. (2016). Classifications of patterned hair loss: A review. Journal of Cutaneous and Aesthetic Surgery, 9(1), 3-12. https://doi.org/10.4103/0974-2077.178536.

Herskovitz, I., & Tosti, A. (2013). Female pattern hair loss. International Journal of Endocrinology and Metabolism, 11(4), e9860. https://doi.org/10.5812/ijem.9860.

Fabbrocini, G., Cantelli, M., Masarà, A., Annunziata, M. C., Marasca, C., & Cacciapuoti, S. (2018). Female pattern hair loss: A clinical, pathophysiologic, and therapeutic review. International Journal of Women’s Dermatology, 4(4), 203-211. https://doi.org/10.1016/j.ijwd.2018.05.001.

Ramos, P. M., Melo, D. F., Radwanski, H., de Almeida, R. F. C., & Miot, H. A. (2023). Female-pattern hair loss: Therapeutic update. Anais Brasileiros de Dermatologia, 98(4), 506-519. https://doi.org/10.1016/j.abd.2022.09.006.

NHS. (2024, January 24). Hair loss. https://www.nhs.uk/symptoms/hair-loss/.